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|United States Patent||RE42,561|
|Adachi , et al.||July 19, 2011|
An organic light emitting device structure having an organic light emitting device (OLED) over a substrate, where the OLED has, for example, an anode, a hole transporting layer (HTL), a first electron transporting layer (ETL) that is doped with a phosphorescent material, a second electron transporting layer (ETL), and a cathode. The OLEDs of the present invention are directed, in particular, to devices that include an emissive layer comprised of an electron transporting host material having a triplet excited state energy level that is higher than the emissive triplet excited state energy level of the phosphorescent dopant material.
|Inventors:||Adachi; Chihaya (Fukuoka, JP), Baldo; Marc A. (Cambridge, MA), Forrest; Stephen R. (Ann Arbor, MI)|
The University of Southern California
The Trustees of Princeton University (Princeton, NJ)
|Filed:||April 16, 2007|
|Application Number||Filing Date||Patent Number||Issue Date|
|Reissue of:||09629335||Aug., 2000||06645645||Nov., 2003|
|Current U.S. Class:||428/690 ; 257/102; 257/103; 257/E51.044; 313/504; 313/506; 428/917|
|Current International Class:||H05B 33/14 (20060101); H01L 51/54 (20060101)|
|5281489||January 1994||Mori et al.|
|5294810||March 1994||Egusa et al.|
|5703436||December 1997||Forrest et al.|
|5707745||January 1998||Forrest et al.|
|6013538||January 2000||Burrows et al.|
|6242115||June 2001||Thomson et al.|
|6303238||October 2001||Thompson et al.|
|6645645||November 2003||Adachi et al.|
|2002/0034656||March 2002||Thompson et al.|
|2002/0146589||October 2002||Akiyama et al.|
|2002/0182441||December 2002||Lamansky et al.|
|2006/0231843||October 2006||Qin et al.|
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